Kit Includes (2) Up-Pipes (1 each of Driver and Passenger); Guarantee:, We guarantee that the seams and multi-wall flex joints will not leak. We have spent countless hours testing, fitting and fabricating these flex joints so that they can/will expand and contract with the heat, but with this design, as they heat up, they only seal better. Without the paper-thin bellows, there is simply no place for the steel to fatigue and crack.Not legal for sale or use in the state of California. Legal ONLY for off-road competition racing vehicles and cannot be used on vehicles that are operated on public streets, roads or highways.,